Wrench for pipe and tool joints



R. D. HILL WRENCH FOR PIPE AND TOOL JOINTS Filed Dec. 16. 1922 wh'ucsszs gwua wkom Patented Oct. 6, 1925.

UNITED STATES:

RICHARD DENNIE HILL, OF WICHITA FALLS, TEXAS, ASSIGNOR. TO E. B. ZITTEL, 0F

BURKBURNETT, TEXAS.

v WRENCH FOR .rrrennnn moor. JOINTS.

Application filed December To all whom it may concern:

Be it known that I. RrcHAnn DENNIE Him, a citizen of the United States, residing at Viichita Falls, in the county of Nichita and State of Texas, have invented a new and useful \Vrench for Pipe and Tool Joints, of which the following is a specification.

The invention relates to a wrench for pipe and tool joints, comprising a housing or wrench support having levers arranged therein. A handle with a cam on one end is attached to said housing, the cam being associated with a fork arrangement in a clevis which operates all of the levers of the wrench.

Another object of the invention is to provide a device of this nature having a cam arranged on a handle to operate the levers of the wrench. The cam is so arranged that when the clamping jaws of the wrench are pressed against the pipe or tool joints, the cam will. be below the center, thus prevent ing the jaws from loosening.

Another object of the invention is to provide a device of this nature comprising a housing with a series of levers and clevises arranged therein. designed to be operated with one handle, the jaws being so arranged when in position for use that they will grip the entire circumference of the pipe or tool joints, thus preventing cutting or crushing said pipe or tool joints.

Another object of the invention is to provide a device of this nature which is very simple and practical and can be manufactured at a very nominal cost.

The nature and advantages of the invention will be better understood when the following detailed description is read in connection with the accompanying drawing.

In the drawing forming a part of this application the various parts will be referred to by numbers.

In the accompanying drawing the wrench is illustrated with one side of the housing removed.

The subject-matter of this invention comprises a housing or wrench support 1, having a handle 2 pivoted thereto. as shown at 3. A cam is arranged on the pivoted end of the handle 2. as shown in the accompanying drawing. 4-. is a cam member slotted at 4 pivoted to the housingl, as shown at 5. 6 is a clamping member slidably attached to the 16, 1922. Serial No. 607,337.

housing 1 by meansof the slot 13in connection with the stud 14-. The cam slotted member 4 and the clamping member 6 are pivotally connected, as shown at 7 8 is a clamping member pivotally attached to the housing 1, as shown at 9. 10 is a clamping member pivoted to the clamping member 8, as shown at 11. 12 is a dog arranged on the free end of the clamping member 10, adapted to engage the aperture in the end of the clamping member 6. 15 is a changeable tooth disposed transversely in an aperture in the housing 1, having one edge projecting as shown for the purpose of providing pipe slippage. 16 is a wedge in the aforedescribed aperture in the housing 1 for the purpose of. holding the tooth 15 in place. It will be noted that the tooth 15 may be changed at any time the exposed cutting edge may become worn.

When in position for use this invention provides a very practical and useful wrench for pipe or tool joints and is especially designed and adapted to the requirements of rotary well drilling. The wrench may also be used wherever it is desired to turn a round object.

The dash and dot outline of the accompanying drawing illustrates the wrench with the jaws open in position to receive pipe or tool oints. It will be noted that by moving the lever 2 from the position outlined with dots and dashes to the position as shown in the main drawing, the cam on the lever 2 which is associated with the (am slotted member 4 operates the clamping member 6.

The clamping members 8 and 10 are pro-- vided with projectionsl'l and 18 for the purpose of automatically closing said clamping members 8 and 10 as the same come in contact with a pipe or tool joint. The dog 12, which engages the aperture in the clamping member 6 provides means of clamping said pipe or tool joints. I

The invention resides in the construction, combination and arrangement of parts as claimed.

While it is believed from the foregoing description the nature and advantages of the device will be readily apparent, I desire to have it understood that I do not limit myself to what is herein shown and described. and that such changes may be resorted to. when desired. as fall within the scope of what is herein claimed.

Ill]

What I claim is:

1. A Wrench comprising two series of pivoted clamping members, cam acting means for opening and closing said clamping members, and means for engaging the free ends of said clamping members.

2. A Wrench support, a clamping member pivoted to said Wrenohsupport, a clamping member pivoted to said first-mentioned 10 clamping member a clamping member slidably and pivotally attached to said Wrench support having an aperture therein to engage the free end of said second-mentioned clamping member a cam slotted member pivoted to said Wrench support and also pivotally attached to said third-mentioned clamping men'iber, a lever pivoted to said Wrench support having a cam on the pivoted end thereof.

RICHARD DENNIE HILL. 

